Steam-generator.



No. 676,!l2. Patented lune ll, I901. W. B. BARKER.

STEAII GENEBATOR.

(Application filed Oct. 25, 1900.)

(N0 lllode l.)

IN vs 70/:

UNITED STATES PATENT OFFICE.

WILLIAM BENJAMIN BARKER, OF LIVERPOOL, ENGLAND.

STEAM-G EN ERATOR.

SPECIFICATION forming part of Iietters Patent No. 676,112, dated June 11, 1901.

Application filed October 25, 1900. Serial No. 34,264. (No model.)

To all whom zltmcty concern.-

Be it known that I, WILLIAM BENJAMIN BARKER, a subject of the Queen of England, and a resident of Liverpool, in the county of Lancaster, England, have invented certain new and useful Improvements in Steam-Generator Water-Oirculators, of which the following is a specification.

This invention has reference to the circulation of water in steam-generators in which the water is held more or less in bulk in a cylinder and wherein a portion of such body of water exists below the level of the heatingsurface of the furnace, flues, or otherwise or is difficult or slow in circulation, such as in generators of the Scotch or marine types and others in which analogous or equivalent conditions exist.

It is well known that in steam-generators of the kinds above referred to and in others more or less analogous to them the water existing or lying at the bottom below the level of the furnaces or fiues thereof is or remains of a lower temperature than the temperature of evaporation, often quite cool relatively, and that this fact is very detrimental to the structure of the generator itself as well as constituting a cause tending to prevent such boilers being as highly efficient in steam generation as they otherwise would be; and the objectofthe present invention is chiefly to overcome these defects and difficulties.

According tothis invention the mode by which the object and effect referred to is accomplished consists in moving the water from the bottom of the generator by a pipe or pipes within it leading from the lower part to the upper part through the water space and steam-space, then out of the steam-generator through a pipe, preferably in the form of a loop, and then down again into the steamgenerator and steam-space, into and through a pipe therein, the lower open end of which will stand preferably a few inches above the water-level.

The invention will be further described with the aid of the accompanying drawing, which illustrates a steam-generator in crosssection of the marine or Scotch type with my improvements applied to it.

Referring to the drawing, a is the shell of the generator, and 1) represents the furnaces.

0 represents the normal water-level.

d represents the pipe within the generatorshell or and extending from the bottom of the water-space to a point near the top of the same space.

e is a pipe in the form of a loop on the outside of the shell (I, one leg of which is connected with pipe (1 and the other with an internal length of pipe f, the lower end of which stands preferably a few inches above thewater-level c. A cock 9 is disposed between the lower end of one leg of the loop-pipe e and the upper end of d, and another cock h is disposed between the lower end of the other leg of the loop-pipe e and the upper end of the pipe f, while a small test-cock 11 is mounted on the pipe 6 near the cock h. Then on the lower end of the pipe f there is a valve 70 suspended by a hinge Z, supported from the pipe f, and this valve has a projecting weighted part m, which is of just sufl'icient weight to press the valve 71: toward and onto the dis= charge end of the pipe fthat is, this weight is very slightly greater than the weight of the valve itself and offers the least possible resistance to the discharge of liquid from this pipe. 7

On the lowerend ofthe pipe (1 there is pref erably a pipe cl, extending along the bottom of the boiler and perforated at its upper part. This distributes the intake of water'from different points throughout the length of the bottom of the boiler.

The mode of putting the apparatus in action is by first closing the cock h and opening the cock 9 and also the small test-cock Then as soon as pressure is created in the generator and acts on the surface of the water 0 water is forced through the pipes 01 and 01 into the loop 6, from whence it discharges by the small test-cock '5. When this takes place, the cock h should be opened and the ,cock '5 closed, whereupon the waterwill fall from the down-leg of the loop-pipe e through the cock h and pipe finto the water in the generator, opening in its fiow the balanced valve 70. This action will continue so long as there is any pressure of steam in the generator.

' With regard to the motive power, in virtue of which the continuous circulation of water up through the pipe d, loop e, and the pipe f after'the closing of the test-tap 1 takes place, it is believed that this is mainly derived by the existence of the loop 6 on the outside of the generator in contact with the air, whereby the water will be cooled somewhatthat is, it will be cooler and denserin: the downflow or descending leg of the loop and pipef than in the rising leg, furnishing thereby just sufficient power to effect the lift and circulation required. I have found in my practice with the invention that a very small pressure will start the apparatus, the cock i being opened and the cock h closed, and that when once started i it continues automatically and without any attention until the pressure in the generator f be a .EQ ex st send mo esp a ly whe @11 the pipes are of about the same diameter, j

lowermost furnaces upward Within said generator to above the water-level, upward outside the generator-shell through the air, and then down into the interior again to a point Hair, and then down into the interior again to a point near the water level, where it is discharged; and a tap on the descending part of the external pipe for allowing the escape of water when starting the apparatus sub fstantially as set forth.

steam generator water c irc u-l ating means, comprising the internal pipe d exhe re'is a ten n y f r t e at on' i c s tempora ly o appea t v 1 ,ei he e i p et'i n appe r t b nte m -a W baskssu char ea employed on the discharge ,end of the 9f but with this valve the action is en- .w 13 'regula and t uo Thetemperat ure of the water at the bottoingo e 'r' teamene a o I fin y my imam-1e ma nta i d W h a ew ree of {highest temperatureof water in the steam-generator, whereas, as is well known, generally the temperatureof water at the bottom e l'ow the lowermost furnace 'b and the em G T-3W of hes l-p at s a at t pa t ,ar.eiqomrarat y .0 a o oo as t cause sh sses and strains to be setup in the pi o en producing leaky joints and riv- 1d causing destruction of the plates by 11 hi t ng 6 is, claimed in respect of the hereindescribed invention is 1. A steam generator Water circulating means, comprising a pipe extending from the eri'orlowerpart of the generator below the tending between the -bottom of the shell the top; an external loop-pipe {e nding abovethe shell of the generator, one leg of which is connected with the pipe d; cocks 11 and h on the descending leg of said-loop; and an internal pipe fsconneetefd with the other leg of the loop e; substantially as ceserined.

4. A steam generator water circulating means comprising an internal pipeeirtending from thelower part of the generator tothe upper part; a loop-pipe connected withsiame, on Itheoutside of the generator-shell; an internal pipe connected with the descending leg of the loop, and extending clown to near the Water-level in the generator; and a (lischarge-controlling valve on the lowei end of saidinternal descen'sion-pipe substantially as set forth. 4 H

In witness whereof I have he-reu ntoset my hand in presence of two witnesses.

WILLIAM BENJAM N BARKER.-

Witnesses:

JNo. W. BROWN,

FRANK E. FLEETWOOD. 

